P
US6079243AExpiredUtilityPatentIndex 92

Method of production of welding wire

Assignee: NIPPON STEEL WELDING PROD ENGPriority: Mar 31, 1997Filed: Mar 27, 1998Granted: Jun 27, 2000
Est. expiryMar 31, 2017(expired)· nominal 20-yr term from priority
Inventors:INOUE SATOSHIMASUDA ICHIROONO TORU
B21C 37/042B21C 1/003B21C 9/00B23K 35/40
92
PatentIndex Score
28
Cited by
13
References
29
Claims

Abstract

PCT No. PCT/JP98/01411 Sec. 371 Date Nov. 20, 1998 Sec. 102(e) Date Nov. 20, 1998 PCT Filed Mar. 27, 1998 PCT Pub. No. WO98/43776 PCT Pub. Date Oct. 8, 1998In manufacturing of welding wires, rough surfaces are formed on the product wires to ensure retention of applied lubricants for satisfactory feeding performance. For this purpose, steps of dry hole die drawing with an application of powder lubricants, roller dies drawing, and wet hole die drawing are executed, at least in a part of a sequence of wire drawing processes. As a result of denting of the powder lubricants on the surfaces of the wires during the dry hole die drawing, rough surfaces are formed on the drawn wires.

Claims

exact text as granted — not AI-modified
We claim: 
     
       1. A method of manufacturing welding wires, comprising: drawing raw wires through a dry hole die to obtain dry hole-drawn wires, wherein powder lubricants are applied to the raw wires during said drawing of the raw wires through said dry hole die, said powder lubricants including at least one of MoS 2  and WS 2  ;   drawing the dry hole-drawn wires through roller dies to obtain roller-drawn wires;   drawing the roller-drawn wires through a wet hole die to obtain wet hole-drawn wires; and   coating the wet hole-drawn wires with lubricating oil to obtain welding wires.   
     
     
       2. The method of claim 1, wherein said drawing of the raw wires through a dry hole die, said drawing of the dry hole-drawn wires through roller dies, said drawing of the roller-drawn wires through a wet hole die, and said coating of the wet hole-drawn wires comprise a final portion of the method of manufacturing welding wires. 
     
     
       3. The method of claim 1, wherein said coating of the wet hole-drawn wires comprises drawing the wet hole-drawn wires through a hole die to obtain the welding wires having a product diameter, and applying said lubricating oil to the wet hole-drawn wires during said drawing of the wet hole-drawn wires through the hole die. 
     
     
       4. The method of claim 1, wherein said drawing of the dry hole-drawn wires through roller dies comprises drawing the dry hole-drawn wires through cassette-type roller dies. 
     
     
       5. The method of claim 1, wherein the raw wires comprise annealed, copper-plated raw wires. 
     
     
       6. The method of claim 1, wherein the raw wires have a surface roughness Ra of at least 0.3 μm along a longitudinal axis of the raw wires. 
     
     
       7. The method of claim 1, wherein the raw wires comprise solid wires. 
     
     
       8. The method of claim 1, wherein the raw wires comprise closed-seam cored wires. 
     
     
       9. The method of claim 1, wherein the welding wires have a surface roughness Ra of at least 0.08 μm along a longitudinal axis of the welding wires. 
     
     
       10. The method of claim 3, wherein said drawing of the dry hole-drawn wires through roller dies comprises drawing the dry hole-drawn wires through cassette-type roller dies. 
     
     
       11. The method of claim 3, wherein the raw wires comprise annealed, copper-plated raw wires. 
     
     
       12. The method of claim 3, wherein the raw wires have a surface roughness Ra of at least 0.3 μm along a longitudinal axis of the raw wires. 
     
     
       13. The method of claim 3, wherein the raw wires comprise solid wires. 
     
     
       14. The method of claim 3, wherein the raw wires comprise closed-seam cored wires. 
     
     
       15. The method of claim 3, wherein the welding wires have a surface roughness Ra of at least 0.08 μm along a longitudinal axis of the welding wires. 
     
     
       16. The method of claim 4, wherein the raw wires comprise annealed, copper-plated raw wires. 
     
     
       17. The method of claim 4, wherein the raw wires have a surface roughness Ra of at least 0.3 μm along a longitudinal axis of the raw wires. 
     
     
       18. The method of claim 4, wherein the raw wires comprise solid wires. 
     
     
       19. The method of claim 4, wherein the raw wires comprise closed-seam cored wires. 
     
     
       20. The method of claim 4, wherein the welding wires have a surface roughness Ra of at least 0.08 μm along a longitudinal axis of the welding wires. 
     
     
       21. The method of claim 5, wherein the raw wires have a surface roughness Ra of at least 0.3 μm along a longitudinal axis of the raw wires. 
     
     
       22. The method of claim 5, wherein the raw wires comprise solid wires. 
     
     
       23. The method of claim 5, wherein the raw wires comprise closed-seam cored wires. 
     
     
       24. The method of claim 5, wherein the welding wires have a surface roughness Ra of at least 0.08 μm along a longitudinal axis of the welding wires. 
     
     
       25. The method of claim 6, wherein the raw wires comprise solid wires. 
     
     
       26. The method of claim 6, wherein the raw wires comprise closed-seam cored wires. 
     
     
       27. The method of claim 6, wherein the welding wires have a surface roughness Ra of at least 0.08 μm along a longitudinal axis of the welding wires. 
     
     
       28. The method of claim 7, wherein the welding wires have a surface roughness Ra of at least 0.08 μm along a longitudinal axis of the welding wires. 
     
     
       29. The method of claim 8, wherein the welding wires have a surface roughness Ra of at least 0.08 μm along a longitudinal axis of the welding wires.

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